Thummikkaphong, S. ., Pupaka, D. ., & Deeying, S. . (2023). Development of an Environment Learning Activities Package for Analytical Thinking Development of undergraduate students: a Case Study of Tha Kham Natural Island Mangrove Forest. Education Journal Faculty of Education, Nakhon Sawan Rajabhat University, 6(3), 13–24. https://doi.org/10.2774.EDU2023.3.261226